HEPData Search

Showing 10 of 87 results

Pion pair production in photon-photon collisions

Blinov, A.E. ; Blinov, V.E. ; Bondar, A.E. ; et al.

Z.Phys.C 53 (1992) 33-39, 1992.

Inspire Record 335707 DOI 10.17182/hepdata.14772

The process γγ→π+π− was measured using the detector MD-1 at VEPP-4. The two-photon reactionse+e−, μ+ μ− and π+ π− pair production were separated using scintillation counters, Cherenkov counters and shower-range chambers. A radiation widthГγγ(f2(1270))=3.1±0.35±0.35 keV was obtained.

1 data table

Table 1

Data read from graph.

Rapidity and transverse momentum structure in pi+ and K+ collisions with Al and Au nuclei at 250-GeV/c

The EHS/NA22 collaboration Agababyan, N.M. ; Ajinenko, I.V. ; Belokopytov, Yu. A. ; et al.

Z.Phys.C 50 (1991) 361-372, 1991.

Inspire Record 302020 DOI 10.17182/hepdata.14979

An analysis is presented of the rapidity and transverse momentum distributions and of the nuclear stopping power in collisions ofπ+ andK+ mesons with Al and Au nuclei at 250 GeV/c. The experimental results are compared to predictions of the additive quark model and the dual parton model. The AQM offers an overall consistent description of the data in this experiment. The DPM reproduces reasonably well the rapidity spectra in the central and projectile fragmentation regions, but fails to describe the nuclear stopping power.

14 data tables

Table 1

No description provided.

Table 2

Excluding protons of PLAB < 1.2 GeV.

Table 3

No description provided.

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Study of fast p, anti-p yields in pi- Be interaction at 40-GeV/c with cumulative particle production

Antipov, Yu.M. ; Batarin, V.A. ; Bezzubov, V.A. ; et al.

IFVE-90-171, 1990.

Inspire Record 304399 DOI 10.17182/hepdata.40709

None

13 data tables

Table 1

CHARGED IS CUMULATIVE PI+-, OR K+-, OR P+-.

Table 2

CHARGED IS CUMULATIVE PI+-, OR K+-, OR P+-.

Table 3

No description provided.

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Study of Hadronic Decays of the $\Z^0$ Boson

The DELPHI collaboration Aarnio, P. ; Abreu, P. ; Adam, W. ; et al.

Phys.Lett.B 240 (1990) 271-282, 1990.

Inspire Record 294894 DOI 10.17182/hepdata.49562

Hadronic decays of Z 0 bosons are studied in the Delphi detector. Global event variables and singel particles inclusive distributions are compared with QCD-based predictions. The mean charged multiplicity is found to be 20.6±1.0 (stat+syst). The mean values of the sphericity, aplanarity, thrust, minor value, p in T and p out T are compared with values found at lower energy e + e − colliders.

13 data tables

Table 1

Corrected Sphericity distribution. Statistical errors only.

Table 2

Corrected Aplanarity distribution. Statistical errors only.

Table 3

Corrected Q3-Q2 distribution. Statistical errors only.

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MOMENTUM AND ANGULAR DISTRIBUTIONS OF pi- MESONS PRODUCED IN d C INTERACTIONS AT 1-GeV/N

Viryasov, N.M. ; Grigorian, V.A. ; Gulkanian, G.R. ; et al.

JINR-P1-89-511, 1989.

Inspire Record 285509 DOI 10.17182/hepdata.38758

None

4 data tables

Table 1

No description provided.

Table 2

No description provided.

Table 3

(1/N)*D(N)/D(P) HAS BEEN FITTED BY (P/MEAN(N=P))**POWER* EXP(-SLOPE*SQRT(P/MEAN(N=P))).

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OBSERVATION OF AN EXOTIC MESON OF 1.9-GeV MASS DECAYING INTO eta-prime eta

The IFVE-Brussels-Annecy-Los-Alamos collaboration Alde, D. ; Binon, F.G. ; Bricman, C. ; et al.

Sov.J.Nucl.Phys. 48 (1988) 1035, 1988.

Inspire Record 264474 DOI 10.17182/hepdata.40730

None

2 data tables

Table 1

No description provided.

Table 2

No description provided.

OBSERVATION OF SLOW PION PRODUCTION IN NUCLEUS NUCLEUS INTERACTIONS

Dubinina, A.I. ; Kolganova, E.D. ; Pozharova, E.A. ; et al.

JETP Lett. 48 (1988) 251-253, 1988.

Inspire Record 271948 DOI 10.17182/hepdata.16886

None

4 data tables

Table 1

BEAM NUCLEUS ARE MIXTURE OF NE AND MG.

Table 2

BEAM NUCLEUS ARE MIXTURE OF NE AND MG.

Table 3

BEAM NUCLEUS ARE MIXTURE OF NE AND MG.

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Fragmentation of Ne-22 in Emulsion at 4.1-a/GeV/c

El-Naghy, A. ; Krasnov, S.A. ; Tolstov, K.D. ; et al.

J.Phys.G 14 (1988) 1125-1137, 1988.

Inspire Record 251875 DOI 10.17182/hepdata.39460

Charge distributions of projectile fragments produced in the interactions of 22Ne beams with emulsion at 4.1A GeV/c have been studied. Correlations between projectile and target fragments and among projectile fragments are presented. The change of charge yield distribution with the violence of the collision has been shown. The present analysis contradicts theoretical calculations describing the inclusive charge yield distribution of fragments by a single process.

4 data tables

Table 1

Table 2

Table 3

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Production of anti-D0 and D- Mesons in Neutron - Carbon Interactions at 40-GeV to 70-GeV

The BIS-2 collaboration Aleev, A.N. ; Arefev, V.A. ; Balandin, V.P. ; et al.

Z.Phys.C 37 (1988) 243, 1988.

Inspire Record 248611 DOI 10.17182/hepdata.9960

The production of$\bar D$ mesons in neutroncarbon interactions at 40–70 GeV/c has been investigated. The$\bar D$ mesons were detected via the hadronic decay modes$\bar D^0\to K^{* + } (892)\pi ^ -$ andD−→K*+(892)π−π−. In the kinematical regionxF>0.5 andpT<1 GeV/c the following inclusive cross sections were measured:$\sigma _{\bar D^0 }= (28 \pm 14)\mu b$ and$\sigma _{D^ -}= (28 \pm 13)\mu b$ per carbon nucleus. The invariant longitudinal momentum spectra can be described by (1−x)N with$N_{\bar D^0 }= 1.1 \pm 0.5 \pm 0.4$ and$N_{D^ -}= 0.8 \pm 0.4 \pm 0.4$ The transverse momentum spectra were parametrized by exp (−BpT2) with$B_{\bar D^0 }= (1.2_{ - 0.9}^{ + 1.1} )({{GeV} \mathord{\left/ {\vphantom {{GeV} c}} \right. \kern-\nulldelimiterspace} c})^{ - 2} $ and$B_{D^ -}= (1.8_{ - 1.0}^{ + 1.3} )({{GeV} \mathord{\left/ {\vphantom {{GeV} c}} \right. \kern-\nulldelimiterspace} c})^{ - 2} $.

4 data tables

Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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